Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2013

[Date Index] [Thread Index] [Author Index]

Search the Archive

DynamicModule Problem

  • To: mathgroup at smc.vnet.net
  • Subject: [mg131389] DynamicModule Problem
  • From: "djmpark" <djmpark at comcast.net>
  • Date: Thu, 18 Jul 2013 02:59:07 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • Delivered-to: l-mathgroup@wolfram.com
  • Delivered-to: mathgroup-outx@smc.vnet.net
  • Delivered-to: mathgroup-newsendx@smc.vnet.net

I would like to have a DynamicModule (in a palette) with a Checkbox that
controlled a Global` variable and that would in turn indicate the state of
the Global variable if it was changed from within the notebook.

Actually, I can do that, but I would also like it to survive quitting and
restarting the Kernel - while leaving the notebook open. That I don't know
how to do. The actual problem is updating the DynamicModule variable from
the notebook. So here is a simple attempt where all I try to do is update
the DynamicModule display from the notebook.

systemState = False; 

systemState = True; 

DynamicModule[

{outsideState},

Dynamic[Refresh[outsideState, TrackedSymbols -> {outsideState}, 

   UpdateInterval -> 0.9]],

Initialization :> (outsideState := Global`systemState)

]

 

If I evaluate one of the systemState cells and then the DynamicModule to
create the dynamic display cell, I can flip the display back and forth by
subsequent evaluations of the systemState cells. If I Quit the kernel the
display changes to 'systemState'. If I then evaluate one of the systemState
cells, restarting the kernel, it behaves properly (for me) and I can again
flip the display.

 

But if I Quit and restart a second time it won't work. If I copy the dynamic
cell it works and if I close and reopen the notebook it works. But I don't
want to do those things and I don't know how to reliably recover from just
quitting and restarting the kernel.

 

 

David Park

djmpark at comcast.net 

http://home.comcast.net/~djmpark/index.html 


  • Prev by Date: Re: Mathematica does not recognize C Compiler
  • Next by Date: Re: Export Import Array
  • Previous by thread: Re: How to combine an If statement with Statistics
  • Next by thread: CRC32 Hash Missmatch